21142033231000 has 128 divisors (see below), whose sum is σ = 54092795328000. Its totient is φ = 7670497776000.

The previous prime is 21142033230971. The next prime is 21142033231001. The reversal of 21142033231000 is 13233024112.

It is a super-2 number, since 2×21142033231000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142033231001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2639931 + ... + 7018069.

It is an arithmetic number, because the mean of its divisors is an integer number (422599963500).

Almost surely, 2^{21142033231000} is an apocalyptic number.

21142033231000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21142033231000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27046397664000).

21142033231000 is an abundant number, since it is smaller than the sum of its proper divisors (32950762097000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21142033231000 is a wasteful number, since it uses less digits than its factorization.

21142033231000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4378610 (or 4378596 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21142033231000 its reverse (13233024112), we get a palindrome (21155266255112).

The spelling of 21142033231000 in words is "twenty-one trillion, one hundred forty-two billion, thirty-three million, two hundred thirty-one thousand".