1211450243154 has 16 divisors (see below), whose sum is σ = 2428156241280. Its totient is φ = 402940788560.

The previous prime is 1211450243137. The next prime is 1211450243197. The reversal of 1211450243154 is 4513420541121.

It is a super-3 number, since 3×1211450243154³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218986794 + ... + 218992325.

It is an arithmetic number, because the mean of its divisors is an integer number (151759765080).

Almost surely, 2^{1211450243154} is an apocalyptic number.

1211450243154 is an abundant number, since it is smaller than the sum of its proper divisors (1216705998126).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211450243154 is a wasteful number, since it uses less digits than its factorization.

1211450243154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437979585.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 1211450243154 its reverse (4513420541121), we get a palindrome (5724870784275).

The spelling of 1211450243154 in words is "one trillion, two hundred eleven billion, four hundred fifty million, two hundred forty-three thousand, one hundred fifty-four".