21121002002110 has 16 divisors (see below), whose sum is σ = 38017939934016. Its totient is φ = 8448370505248.

The previous prime is 21121002002101. The next prime is 21121002002119. The reversal of 21121002002110 is 1120020012112.

It is an interprime number because it is at equal distance from previous prime (21121002002101) and next prime (21121002002119).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121002002119) 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, 742297 + ... + 6541636.

It is an arithmetic number, because the mean of its divisors is an integer number (2376121245876).

Almost surely, 2^{21121002002110} is an apocalyptic number.

21121002002110 is a deficient number, since it is larger than the sum of its proper divisors (16896937931906).

21121002002110 is a wasteful number, since it uses less digits than its factorization.

21121002002110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7573907.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21121002002110 its reverse (1120020012112), we get a palindrome (22241022014222).

The spelling of 21121002002110 in words is "twenty-one trillion, one hundred twenty-one billion, two million, two thousand, one hundred ten".