10021212452501 has 4 divisors (see below), whose sum is σ = 10021495565004. Its totient is φ = 10020929340000.

The previous prime is 10021212452491. The next prime is 10021212452521. The reversal of 10021212452501 is 10525421212001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3179713080625 + 6841499371876 = 1783175^2 + 2615626^2 .

It is a cyclic number.

It is not a de Polignac number, because 10021212452501 - 2²² = 10021208258197 is a prime.

It is a super-2 number, since 2×10021212452501² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021212452521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141503150 + ... + 141573951.

It is an arithmetic number, because the mean of its divisors is an integer number (2505373891251).

Almost surely, 2^{10021212452501} is an apocalyptic number.

It is an amenable number.

10021212452501 is a deficient number, since it is larger than the sum of its proper divisors (283112503).

10021212452501 is an equidigital number, since it uses as much as digits as its factorization.

10021212452501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283112502.

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 10021212452501 its reverse (10525421212001), we get a palindrome (20546633664502).

The spelling of 10021212452501 in words is "ten trillion, twenty-one billion, two hundred twelve million, four hundred fifty-two thousand, five hundred one".