211220102000 has 40 divisors (see below), whose sum is σ = 510730211472. Its totient is φ = 84488040000.

The previous prime is 211220101969. The next prime is 211220102029. The reversal of 211220102000 is 201022112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×211220102000² (a number of 23 digits) contains 22 as substring.

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, 52803026 + ... + 52807025.

Almost surely, 2^211220102000 is an apocalyptic number.

211220102000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211220102000 is an abundant number, since it is smaller than the sum of its proper divisors (299510109472).

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

211220102000 is a wasteful number, since it uses less digits than its factorization.

211220102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105610074 (or 105610058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 211220102000 its reverse (201022112), we get a palindrome (211421124112).

The spelling of 211220102000 in words is "two hundred eleven billion, two hundred twenty million, one hundred two thousand".