1021400115554 has 96 divisors (see below), whose sum is σ = 1908519356160. Its totient is φ = 401413349376.

The previous prime is 1021400115551. The next prime is 1021400115601. The reversal of 1021400115554 is 4555110041201.

It is not an unprimeable number, because it can be changed into a prime (1021400115551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 500930867 + ... + 500932905.

It is an arithmetic number, because the mean of its divisors is an integer number (19880409960).

Almost surely, 2^{1021400115554} is an apocalyptic number.

1021400115554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1021400115554 is a deficient number, since it is larger than the sum of its proper divisors (887119240606).

1021400115554 is a wasteful number, since it uses less digits than its factorization.

1021400115554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364 (or 3351 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 29.

Adding to 1021400115554 its reverse (4555110041201), we get a palindrome (5576510156755).

The spelling of 1021400115554 in words is "one trillion, twenty-one billion, four hundred million, one hundred fifteen thousand, five hundred fifty-four".