1021212525454 has 16 divisors (see below), whose sum is σ = 1671643733760. Its totient is φ = 464029541560.

The previous prime is 1021212525451. The next prime is 1021212525517. The reversal of 1021212525454 is 4545252121201.

It is a super-2 number, since 2×1021212525454² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021212525451) 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, 7832374 + ... + 7961689.

It is an arithmetic number, because the mean of its divisors is an integer number (104477733360).

Almost surely, 2^{1021212525454} is an apocalyptic number.

1021212525454 is a deficient number, since it is larger than the sum of its proper divisors (650431208306).

1021212525454 is a wasteful number, since it uses less digits than its factorization.

1021212525454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15797015.

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 1021212525454 its reverse (4545252121201), we get a palindrome (5566464646655).

The spelling of 1021212525454 in words is "one trillion, twenty-one billion, two hundred twelve million, five hundred twenty-five thousand, four hundred fifty-four".