21000102021122 has 16 divisors (see below), whose sum is σ = 36000400632000. Its totient is φ = 8999987288688.

The previous prime is 21000102021121. The next prime is 21000102021127. The reversal of 21000102021122 is 22112020100012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 21000102021097 and 21000102021106.

It is not an unprimeable number, because it can be changed into a prime (21000102021121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349872 + ... + 6893627.

It is an arithmetic number, because the mean of its divisors is an integer number (2250025039500).

Almost surely, 2^{21000102021122} is an apocalyptic number.

21000102021122 is a deficient number, since it is larger than the sum of its proper divisors (15000298610878).

21000102021122 is a wasteful number, since it uses less digits than its factorization.

21000102021122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9405785.

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

Adding to 21000102021122 its reverse (22112020100012), we get a palindrome (43112122121134).

The spelling of 21000102021122 in words is "twenty-one trillion, one hundred two million, twenty-one thousand, one hundred twenty-two".