1143921111421 has 16 divisors (see below), whose sum is σ = 1253194446528. Its totient is φ = 1035537148800.

The previous prime is 1143921111419. The next prime is 1143921111449. The reversal of 1143921111421 is 1241111293411.

It is not a de Polignac number, because 1143921111421 - 2¹ = 1143921111419 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 (1143921111121) 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, 2236531 + ... + 2699983.

It is an arithmetic number, because the mean of its divisors is an integer number (78324652908).

Almost surely, 2^{1143921111421} is an apocalyptic number.

1143921111421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1143921111421 is a deficient number, since it is larger than the sum of its proper divisors (109273335107).

1143921111421 is a wasteful number, since it uses less digits than its factorization.

1143921111421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464412.

The product of its digits is 1728, while the sum is 31.

The spelling of 1143921111421 in words is "one trillion, one hundred forty-three billion, nine hundred twenty-one million, one hundred eleven thousand, four hundred twenty-one".