21142235102 has 16 divisors (see below), whose sum is σ = 31933521312. Its totient is φ = 10497772800.

The previous prime is 21142235087. The next prime is 21142235117. The reversal of 21142235102 is 20153224112.

It is an interprime number because it is at equal distance from previous prime (21142235087) and next prime (21142235117).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1136258 + ... + 1154714.

It is an arithmetic number, because the mean of its divisors is an integer number (1995845082).

Almost surely, 2^21142235102 is an apocalyptic number.

21142235102 is a deficient number, since it is larger than the sum of its proper divisors (10791286210).

21142235102 is a wasteful number, since it uses less digits than its factorization.

21142235102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22403.

The product of its (nonzero) digits is 960, while the sum is 23.

Adding to 21142235102 its reverse (20153224112), we get a palindrome (41295459214).

The spelling of 21142235102 in words is "twenty-one billion, one hundred forty-two million, two hundred thirty-five thousand, one hundred two".