211121001200020 has 48 divisors (see below), whose sum is σ = 457657603393536. Its totient is φ = 81723945024000.

The previous prime is 211121001200017. The next prime is 211121001200023. The reversal of 211121001200020 is 20002100121112.

It is an interprime number because it is at equal distance from previous prime (211121001200017) and next prime (211121001200023).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121001200023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222578565 + ... + 223525075.

It is an arithmetic number, because the mean of its divisors is an integer number (9534533404032).

Almost surely, 2^{211121001200020} is an apocalyptic number.

211121001200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211121001200020 is an abundant number, since it is smaller than the sum of its proper divisors (246536602193516).

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

211121001200020 is a wasteful number, since it uses less digits than its factorization.

211121001200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306312 (or 1306310 counting only the distinct ones).

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

Adding to 211121001200020 its reverse (20002100121112), we get a palindrome (231123101321132).

The spelling of 211121001200020 in words is "two hundred eleven trillion, one hundred twenty-one billion, one million, two hundred thousand, twenty".