249012221012121 has 16 divisors (see below), whose sum is σ = 399418098867200. Its totient is φ = 134803608367248.

The previous prime is 249012221012101. The next prime is 249012221012173. The reversal of 249012221012121 is 121210122210942.

It is not a de Polignac number, because 249012221012121 - 2¹⁸ = 249012220749977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249012221012101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312045389341 + ... + 312045390138.

It is an arithmetic number, because the mean of its divisors is an integer number (24963631179200).

Almost surely, 2^{249012221012121} is an apocalyptic number.

249012221012121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

249012221012121 is a deficient number, since it is larger than the sum of its proper divisors (150405877855079).

249012221012121 is a wasteful number, since it uses less digits than its factorization.

249012221012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624090779508.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 249012221012121 in words is "two hundred forty-nine trillion, twelve billion, two hundred twenty-one million, twelve thousand, one hundred twenty-one".