21103201231002 has 48 divisors (see below), whose sum is σ = 49880658578400. Its totient is φ = 6394862700000.

The previous prime is 21103201230919. The next prime is 21103201231009. The reversal of 21103201231002 is 20013210230112.

21103201231002 is a `hidden beast` number, since 2 + 110 + 320 + 1 + 231 + 0 + 0 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21103201231009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34724752 + ... + 35327252.

It is an arithmetic number, because the mean of its divisors is an integer number (1039180387050).

Almost surely, 2^{21103201231002} is an apocalyptic number.

21103201231002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21103201231002 is an abundant number, since it is smaller than the sum of its proper divisors (28777457347398).

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

21103201231002 is a wasteful number, since it uses less digits than its factorization.

21103201231002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779419 (or 779416 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21103201231002 its reverse (20013210230112), we get a palindrome (41116411461114).

The spelling of 21103201231002 in words is "twenty-one trillion, one hundred three billion, two hundred one million, two hundred thirty-one thousand, two".