1235454552021 has 8 divisors (see below), whose sum is σ = 1647327588544. Its totient is φ = 823608941760.

The previous prime is 1235454552019. The next prime is 1235454552023. The reversal of 1235454552021 is 1202554545321.

It is an interprime number because it is at equal distance from previous prime (1235454552019) and next prime (1235454552023).

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

It is not a de Polignac number, because 1235454552021 - 2¹ = 1235454552019 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 (1235454552023) 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, 6751225 + ... + 6931806.

It is an arithmetic number, because the mean of its divisors is an integer number (205915948568).

Almost surely, 2^{1235454552021} is an apocalyptic number.

It is an amenable number.

1235454552021 is a deficient number, since it is larger than the sum of its proper divisors (411873036523).

1235454552021 is a wasteful number, since it uses less digits than its factorization.

1235454552021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13713131.

The product of its (nonzero) digits is 240000, while the sum is 39.

The spelling of 1235454552021 in words is "one trillion, two hundred thirty-five billion, four hundred fifty-four million, five hundred fifty-two thousand, twenty-one".