212111021101020 has 96 divisors (see below), whose sum is σ = 620737502450688. Its totient is φ = 54015992228352.

The previous prime is 212111021101003. The next prime is 212111021101033. The reversal of 212111021101020 is 20101120111212.

It is a happy number.

212111021101020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123705784 + ... + 125408703.

It is an arithmetic number, because the mean of its divisors is an integer number (6466015650528).

Almost surely, 2^{212111021101020} is an apocalyptic number.

212111021101020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212111021101020 is an abundant number, since it is smaller than the sum of its proper divisors (408626481349668).

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

212111021101020 is a wasteful number, since it uses less digits than its factorization.

212111021101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249115139 (or 249115137 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212111021101020 its reverse (20101120111212), we get a palindrome (232212141212232).

The spelling of 212111021101020 in words is "two hundred twelve trillion, one hundred eleven billion, twenty-one million, one hundred one thousand, twenty".