10212051151661 has 4 divisors (see below), whose sum is σ = 10212657476832. Its totient is φ = 10211444826492.

The previous prime is 10212051151651. The next prime is 10212051151667. The reversal of 10212051151661 is 16615115021201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10212051151661 - 2¹⁴ = 10212051135277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10212051151667) 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, 303137321 + ... + 303171006.

It is an arithmetic number, because the mean of its divisors is an integer number (2553164369208).

Almost surely, 2^{10212051151661} is an apocalyptic number.

It is an amenable number.

10212051151661 is a deficient number, since it is larger than the sum of its proper divisors (606325171).

10212051151661 is an equidigital number, since it uses as much as digits as its factorization.

10212051151661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606325170.

The product of its (nonzero) digits is 3600, while the sum is 32.

Adding to 10212051151661 its reverse (16615115021201), we get a palindrome (26827166172862).

The spelling of 10212051151661 in words is "ten trillion, two hundred twelve billion, fifty-one million, one hundred fifty-one thousand, six hundred sixty-one".