202121100220012 has 24 divisors (see below), whose sum is σ = 354282629828400. Its totient is φ = 100897560326976.

The previous prime is 202121100219917. The next prime is 202121100220019. The reversal of 202121100220012 is 210022001121202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (202121100220019) 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, 3207414 + ... + 20360002.

It is an arithmetic number, because the mean of its divisors is an integer number (14761776242850).

Almost surely, 2^{202121100220012} is an apocalyptic number.

It is an amenable number.

202121100220012 is a deficient number, since it is larger than the sum of its proper divisors (152161529608388).

202121100220012 is a wasteful number, since it uses less digits than its factorization.

202121100220012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17157345 (or 17157343 counting only the distinct ones).

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

Adding to 202121100220012 its reverse (210022001121202), we get a palindrome (412143101341214).

The spelling of 202121100220012 in words is "two hundred two trillion, one hundred twenty-one billion, one hundred million, two hundred twenty thousand, twelve".