21100120101122 has 4 divisors (see below), whose sum is σ = 31650180151686. Its totient is φ = 10550060050560.

The previous prime is 21100120101121. The next prime is 21100120101187. The reversal of 21100120101122 is 22110102100112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 14998819954561 + 6101300146561 = 3872831^2 + 2470081^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21100120101097 and 21100120101106.

It is not an unprimeable number, because it can be changed into a prime (21100120101121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275030025279 + ... + 5275030025282.

Almost surely, 2^{21100120101122} is an apocalyptic number.

21100120101122 is a deficient number, since it is larger than the sum of its proper divisors (10550060050564).

21100120101122 is a wasteful number, since it uses less digits than its factorization.

21100120101122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550060050563.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21100120101122 its reverse (22110102100112), we get a palindrome (43210222201234).

The spelling of 21100120101122 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, one hundred one thousand, one hundred twenty-two".