21101212212000 has 192 divisors, whose sum is σ = 70101201800448. Its totient is φ = 5547736320000.

The previous prime is 21101212211921. The next prime is 21101212212013. The reversal of 21101212212000 is 21221210112.

It is a super-2 number, since 2×21101212212000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11531341 + ... + 13235340.

It is an arithmetic number, because the mean of its divisors is an integer number (365110426044).

Almost surely, 2^{21101212212000} is an apocalyptic number.

21101212212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21101212212000 is an abundant number, since it is smaller than the sum of its proper divisors (48999989588448).

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

21101212212000 is a wasteful number, since it uses less digits than its factorization.

21101212212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24766780 (or 24766762 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21101212212000 its reverse (21221210112), we get a palindrome (21122433422112).

The spelling of 21101212212000 in words is "twenty-one trillion, one hundred one billion, two hundred twelve million, two hundred twelve thousand".