137620701022621 has 2 divisors, whose sum is σ = 137620701022622. Its totient is φ = 137620701022620.

The previous prime is 137620701022591. The next prime is 137620701022669. The reversal of 137620701022621 is 126220107026731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134220682183225 + 3400018839396 = 11585365^2 + 1843914^2 .

It is a cyclic number.

It is not a de Polignac number, because 137620701022621 - 2¹¹ = 137620701020573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137620701022681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68810350511310 + 68810350511311.

It is an arithmetic number, because the mean of its divisors is an integer number (68810350511311).

Almost surely, 2^{137620701022621} is an apocalyptic number.

It is an amenable number.

137620701022621 is a deficient number, since it is larger than the sum of its proper divisors (1).

137620701022621 is an equidigital number, since it uses as much as digits as its factorization.

137620701022621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 137620701022621 in words is "one hundred thirty-seven trillion, six hundred twenty billion, seven hundred one million, twenty-two thousand, six hundred twenty-one".