212120957 has 2 divisors, whose sum is σ = 212120958. Its totient is φ = 212120956.

The previous prime is 212120929. The next prime is 212120977. The reversal of 212120957 is 759021212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201810436 + 10310521 = 14206^2 + 3211^2 .

It is a cyclic number.

It is not a de Polignac number, because 212120957 - 2¹⁶ = 212055421 is a prime.

It is a super-3 number, since 3×212120957³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212120977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060478 + 106060479.

It is an arithmetic number, because the mean of its divisors is an integer number (106060479).

Almost surely, 2^212120957 is an apocalyptic number.

It is an amenable number.

212120957 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120957 is an equidigital number, since it uses as much as digits as its factorization.

212120957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 212120957 is about 14564.3728666908. The cubic root of 212120957 is about 596.3865758130.

The spelling of 212120957 in words is "two hundred twelve million, one hundred twenty thousand, nine hundred fifty-seven".