21100102122002 has 8 divisors (see below), whose sum is σ = 32422108138812. Its totient is φ = 10292732742400.

The previous prime is 21100102121993. The next prime is 21100102122013. The reversal of 21100102122002 is 20022120100112.

It can be written as a sum of positive squares in 2 ways, for example, as 18247924954081 + 2852177167921 = 4271759^2 + 1688839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128659159199 + ... + 128659159362.

Almost surely, 2^{21100102122002} is an apocalyptic number.

21100102122002 is a deficient number, since it is larger than the sum of its proper divisors (11322006016810).

21100102122002 is a wasteful number, since it uses less digits than its factorization.

21100102122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257318318604.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21100102122002 its reverse (20022120100112), we get a palindrome (41122222222114).

The spelling of 21100102122002 in words is "twenty-one trillion, one hundred billion, one hundred two million, one hundred twenty-two thousand, two".