10122142161421 has 8 divisors (see below), whose sum is σ = 10222661201688. Its totient is φ = 10021629000000.

The previous prime is 10122142161283. The next prime is 10122142161457. The reversal of 10122142161421 is 12416124122101.

It can be written as a sum of positive squares in 4 ways, for example, as 5282362158921 + 4839780002500 = 2298339^2 + 2199950^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10122142161421 - 2⁹ = 10122142160909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10122142161421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10122142161221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2032191 + ... + 4937011.

It is an arithmetic number, because the mean of its divisors is an integer number (1277832650211).

Almost surely, 2^{10122142161421} is an apocalyptic number.

It is an amenable number.

10122142161421 is a deficient number, since it is larger than the sum of its proper divisors (100519040267).

10122142161421 is a wasteful number, since it uses less digits than its factorization.

10122142161421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2939423.

The product of its (nonzero) digits is 1536, while the sum is 28.

Adding to 10122142161421 its reverse (12416124122101), we get a palindrome (22538266283522).

The spelling of 10122142161421 in words is "ten trillion, one hundred twenty-two billion, one hundred forty-two million, one hundred sixty-one thousand, four hundred twenty-one".