211220002120120 has 64 divisors (see below), whose sum is σ = 544078460940480. Its totient is φ = 72292778090496.

The previous prime is 211220002120079. The next prime is 211220002120133. The reversal of 211220002120120 is 21021200022112.

It is a happy number.

It is a super-2 number, since 2×211220002120120² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220002120094 and 211220002120103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 653527479 + ... + 653850598.

It is an arithmetic number, because the mean of its divisors is an integer number (8501225952195).

Almost surely, 2^{211220002120120} is an apocalyptic number.

211220002120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220002120120 is an abundant number, since it is smaller than the sum of its proper divisors (332858458820360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211220002120120 is a wasteful number, since it uses less digits than its factorization.

211220002120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307378672 (or 1307378668 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211220002120120 its reverse (21021200022112), we get a palindrome (232241202142232).

The spelling of 211220002120120 in words is "two hundred eleven trillion, two hundred twenty billion, two million, one hundred twenty thousand, one hundred twenty".