2100021136357 has 2 divisors, whose sum is σ = 2100021136358. Its totient is φ = 2100021136356.

The previous prime is 2100021136349. The next prime is 2100021136399. The reversal of 2100021136357 is 7536311200012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1886120436321 + 213900700036 = 1373361^2 + 462494^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100021136357 - 2³ = 2100021136349 is a prime.

It is a super-2 number, since 2×2100021136357² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100021130357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050010568178 + 1050010568179.

It is an arithmetic number, because the mean of its divisors is an integer number (1050010568179).

Almost surely, 2^{2100021136357} is an apocalyptic number.

It is an amenable number.

2100021136357 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100021136357 is an equidigital number, since it uses as much as digits as its factorization.

2100021136357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

Adding to 2100021136357 its reverse (7536311200012), we get a palindrome (9636332336369).

The spelling of 2100021136357 in words is "two trillion, one hundred billion, twenty-one million, one hundred thirty-six thousand, three hundred fifty-seven".